Means for forming laminated tubes from web material



.Fame l5, E937. C. T. WALTER' @083,959

MEANS FOR FORMING LAMINATED TIJBES FROM WEB MATERlAL Filed June 5, 19552 Sheets-Sheet l ffy, j'

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C/dr/e 2.' We Zier INVENTOR @MWM ATTORNEY June l5, 137. c. T. WALTER2,083,969'

MEANS FOR FORMING LAMINATD TUBES FROM WEB MATERIAL Filed June 5, 1935 2Sheets-Sheet 2 C72/arles .Z Miter INVENTOR ATTORNEY Patented lJune 15,1937 PATENT OFFICE MEANS FOB FORMING LAIVIINATED TUBES FROM WEB MATERIALCharles T. Walter, Chicago, lll., assignor to Industrial PatentsCorporation, Chicago, Ill., a corporation of Delaware Application June5, 1935, ISerial. No. 25,176

2 Claims.

This invention relatesto an improved apparatus for forming laminatedtubes from web material. T One of the objects of the invention is toprovide apparatus for forming synthetic sausage casings from webcellulose material.

Another object of the invention is to provide* means for forminglaminated tubes from web material in a continuous manner.

Other objects of the invention will be apparent from the description and`claims which follow.

In the accompanying drawings similar reference characters in the severalfigures indicate similar parts.

Figure 1 is a sectional View illustrating one embodiment of theapparatus of the present invention. v

Figure 2is a vplan view of the apparatus shown in Figure 1. s

Figure 3 is a side view partly in section showing another embodiment ofthe apparatus. y

' Figure 4 isA a cross sectional view of the forming horn and mandreltaken on 4-4 of Figure 3.

Figure 5 is a sectional view of the laminated r web from which thecasing is formed taken on line 5'-5 of Figure 1. A

Figure 6 is asectional view of the casing after forming taken on theline 6.-6 of Figure 1.

Figure '7 is a perspective view of a portion of casing prepared with theapparatus of the present invention.

Referring now more particularly to Figure 1:

The various elements of the apparatus are mounted upon frame I. A rollof web cellulosic material 2 unwinds from shaft 3, rotatably supportedin brackets 4 and 5. As cellulosic web 6 is unwound from roll 2 itpasses over glue roll 1. Glue roll 1 is mounted on shaft 8 which isrotatl ably mounted in brackets 9 and I0. Glue roll 1 picks up liquidglue or cement from pan II and applies the glue or cement to the undersurface of web 6 as it is drawn tautly over applicator 1. Roll I2 of webcellulose material is wound on shaft I3 which is rotatably mounted inbrackets I4 and I5. Cellulosic web I6, as it is unwound from roll I2.passes between rollers l1 and I8 as does web 6. ARoller I1 is mounted onshaft I9 and roller I8 is mounted on shaft 20. Shaft I9 is rotatablymounted in brackets 2l and 22 and shaft 2l) is rotatably mounted inbrackets 23 and 24. Rollers I1 and I8 serve to press web 6 and web I6together forming a laminated web 25.

It will be noted by reference to Figure 2 that roll I2 and roll 2 arepositioned on-respective shafts I3 and 3 such that the laminated web 25formed of webs I6 and 6 is formed with the laminations offset. This maybe clearly seen in Figure 5. 'I'his construction, it will be seen byreference to Figure 5, results in the area A of single thickness, area Bof double thickness and the 5 area C of single thickness. Laminated web25 after passing between rollers I1 and I8 which have served to firmlyand smoothly form the laminated web 25 from webs I6 and 6 passes overglue applicator roll 26. 10

It will be noted by reference to Figure 2 that applicator roll 26 isnarrow and serves to apply a band B1 of glue orv cement upon area B asindicated in Figure 5. Applicator roll 26 may .or may not be largeenough to apply glue or cement 15 as well to area A. This, however, isunnecessary since area A has already received glue or cement fromapplicator 1. Applicator roll 26 is mounted on shaft 21 which isrotatably mounted in brackets 28 and 29. Applicator roll 26 picks up 20glue from glue box 30. After passing over applicator roll 26 laminatedweb 25 passes over tensioning roll 3|. Tensioning roll 3| is mountedupon shaft 32 which is rotatably mounted in brackets 33 and 34. It willbe noted that roll 3| 25 is provided with groove 3 Iw to avoid contactwith area B1. In the form of the apparatus shown in Figures 1 and 2 web25 is then fed over mandrel 35 supported by risers 36 and 36a.

Web 25, which is, of course, moving in the di- 30 rection of the arrows,is pressed downwardly by forming spindle 31. Spindle 31 is rotatablymounted on shaft 38 which is mounted in brackets 39 and 40. Sidespindles 4I and 42 serve to complete the forming of the cylindricaltube. Spin- 35 dle 4I is rotatablymounted on shaft 43 which is rigidlyaiiixed to frame I. Spindle 42 is rotatably mounted on shaft 44 which isalso rigidly aiiixed to frame I.

The formed casing then passes over spindles 45 40 and 46 which serve toseal the joint 41. Spindle 45 is rotatably mounted on shaft 48 which issupported in brackets 49 and 50. Spindle 46 is rotatably mounted opshaft 5I which is supported in brackets 52 and 53. The completed casingis 45 then passed betweenpresser rollers 54 and 55. Roller 54 is mountedon shaft 56 supported in bracketsv 51 and 58. Roller 55 is mounted onshaft 59 supported in brackets 66 andl. Presser rollers 54 and 55 arepositioned closely in order 50 to provide sufiicient friction to drawthe material through the apparatus. Rollers 54 and 55 are somewhatnarrower than the casing to avoid creasing the casing too sharply at theedges. Roller 55 is driven by motor 62 through chain 63 55 and sprockets64 and 85. After passing between rollers l and 55 the completed ca sing68 may be cut into desired lengths as shown in Figure '7.y

In the embodiment of the forming means shown in Figure 3 forming horn 61is'substituted for spindles 31, 4I and 42 and serves a function similarto that served by the spindles.

It will be seen that by use of the apparatus of the present invention,there is provided a laminated cellulosic casing of great strength, thecasing being formed from web cellulose or other suitable material in acontinuousmanner and being provided with a lap joint as may be readilynoted in Figure 6.

I claim:

1. An apparatus for forming tubular casings from web material comprisingmeans for supporting a rst web roll, means offset relative to the Ysupporting means for supporting a second web roll so that one of thelongitudinal edges of the web of the rst roll will project beyond thecorresponding longitudinal edge of the web of the second roll and theother longitudinal edge of the web of the second roll will projectbeyond the corresponding longitudinal edge of the web of the first roll,means for simultaneously feeding the webs ofthe several rolls, means forapplying an adhesive to one entire surface of the web of theY firstroll, means for bonding the webs of the several rolls, means forapplying an adhesive near the longitudinal edge of the web of the secondroll adjacent the projecting edge of the web of the first roll and'meansfor forming the resultant laminated web in the form of a tube with thelongitudinal edges of each of the webs of the several rolls inover-lapping relationship to provide a double lapped seam.

2. An apparatus for forming tubular casings from web material comprisingmeans for supporting a iirst web roll, means oi'i'set relative to Y thesupporting means for supporting a second web roll so that one ofthelongitudinal edges o! the web of the first roll will project beyond thecorresponding longitudinal edge of the web o1' the second roll and theother longitudinal edge of the web of the second roll will projectbeyond the corresponding longitudinal edge of the web of the first roll,means including presser rollers for simultaneously feeding the webs ofthe several rolls, means for applying an adhesive to one entire surfaceof the web of the first roll, means for bonding the webs of the severalrolls, means for applying an adhesive near the longitudinal edge of theweb of the second roll adjacent the projecting edge of the web of therst roll and means for forming the resultant laminated web in the formof a tube with the longitudinal edges of each of the webs of the severalrolls in overlapping relationship to provide a double lapped seam, thepresser rollers of the feeding means being of less width than the formedtube and adapted for applying pressure against the lapped seam of theformed tube.

" CHARLES T. WALTER.

